Gas-engine



Patented Ian. [0, I899.

E. & W. F. BAUBOT H.

GAS ENGINE.

(Application filed Aug. 8, 1897.)

(No Model.)

3 Shasta-Sheet l.

Patented Ian. [0, I899.

E. a w. F. BAUBOTH.

GAS ENGINE.

' (Application filed Aug. 3, 1897.)

3 Shots-Sheet 2 (No Model'.)

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THE NuRms PETERS cc. PHOm-LITHQ, WMNINGTON, n. c.

No. muss.

Patented Jan. I0, I899. E. & 'w. r. 'BAUBOTH. 4

GAS ENGINE.

(Appliea tion-filed Aug. 8, 1897.)

(No Model.)

3 Sheets-Sheat 3;

w vbmeoow gwvowbom fi mma THE NORRIS FEYERS en. PHOYGLITHO. wnsumeYON,n. c.

UNITED STATES PATENT OFFICE.

EMIL BAUROTII AND YVILLIAM F. BAUROTH, OF SPRINGFIELD, OHIO.

GAS-ENGINE.

SPECIFICATION forming part of Letters Patent No. 617,388, dated January10, 1899.

Application filed August 3, 1897. Serial No. 646,866. (No model.)

To aZZ whom it mag concern.-

Be it known that we, EMIL BAUEOTH and WILLIAM F. BAUROTH, citizens ofthe United States, residing at Springfield, in the county of Clark andState of Ohio, have invented certain new and usefullmprovementsinGas-Engines, of which the following is a specification, reference beinghad therein to the accompanyin g drawings.

This invention relates to certain new and useful improvements in gas orgasolene engines.

The special features of our invention relate, first, to the devices foractuating the gas inlet valve second, to devices for holding theexhaust-valve open during such time as the engine is running without gasor gasolene being admitted, so that air which is drawn in by theoutstroke of the piston will be expelled on the instroke with perfectfreedom to prevent the useless compression of the air and the consequentretarding of the momentum, and, third, to connecting the piston-rod withthe piston by a spring-joint in such manner that when thecharge is inthe cylinder to undergo compression the piston will yield relatively tothe piston-rod, whose stroke is fixed, enough to give space for thecharge, but which piston will extend back practically the whole lengthof the cylinder when the exhaust-port above referred to is open, so asto entirely dispel all of the productsof air.

that may be in or drawn into the cylinder, whereby the piston willsometimes leave a space in the cylinder and will sometimes travel backandtake up or occupy such space.

In the accompanying drawings, on which like reference letters andnumerals indicate corresponding parts, Figure 1 is a plan view of agas-engine embodying our invention; Fig. 2, a rear elevation of the samewith a portion of the igniting-chamber broken away; Fig. 3, a sideelevation of a portion of the engine with the admission-chamber,igniting-chamber, and exhaust-pipe in section; Fig. 4, a detail partialplan and sectional view, the section being taken on the line a: w ofFig. 3. Fig. 5

is a detail view of a portion of the'mechanism for operating the movableelectrode; Fig. 6, a detail elevation and partial section of the devicesfor actuating the movable electrode; Fig. '7, a detail perspective Viewof the devices for supporting the supplemental exhaust-valve during theinterval when gas is not being taken in, and Fig. 8 an end elevation ofthe piston with the piston-rod in section.

The letter A designates a suitable bed for our engine, upon which aremounted a cylintrunnion L ismounted in the blocks G and connected withthe piston-rod in some suitable manner, as by means of passing throughan eye in the end of the piston-rod and being held by a cap-plate M,secured by nuts 0, held by lock-nuts P. Thus it will be seen that thereis a spring connection between the piston-rod and piston, so thatalthough the piston-rod stroke is fixed and definite the strokeof thepiston is variable, having as much independent movement as is measuredbetween the ends of the blocks G and the shoulders Q. Thus, when theinstroke is made, if a charge is in the cylinder to be compressed thepiston-head will yield as the charge becomes more solidified,compressing the springs I and finally bringing the shoulders Q. againstthe blocks G, thus giving space for the compressed charge and thus alsomaking the connection between the piston and the piston-rod solid at thetime the explosion takes place. When, however, the auxiliaryexhaust-port is open, as hereinafter specified, and it is desired to ridthe cylinder of the residual gases or to rid it of air, the pistonheadtravels back full length, or practically the full length, of thecylinder. When, too, the outstroke is made, the piston projects beyondthe end of the piston-rod to its full limit, because of the action ofthe springs and the so-called sucking force of the piston. This holdsthe piston against the outer face of the segmental blocks G. Thus wehave provided for a spring or yielding connection between the piston andpiston-rod by which at one time the piston will not travel fully back inthe cylinder and at another it will do so for the purposes described.

The letter R designates the admission-chamber, bolted to one side of thecylinder and having a partition S, in which is seated a check-valve T,held down by a spring U. A passage V leads from above this check-valveto the cylinder, passing over an auxiliaryexhaustvalve XV, seated alsoin the partition S and having a spring X acting between suitableshoulders to keep the valve seated. A passage Y, as shown in dottedlines in Figs. 3 and 4, leads from beneath the exhaustvalve \V to anexhaust-passage Z, (shown in Fig. 4,) which opens into the exhaust-portproper Z. \Vhen the piston makes an outward stroke, it draws in the airand gas past the check-valve T and through the passage V. -lVhen thepiston makes an instroke, it will exhaust the products of combustion,gases, &c., or pure air in the cylinder, as the case may be, if theauxiliary exhaust-valve \V is up. Certain devices presently to bedescribed operate to hold it up when no gas is being taken in, as willpresently be described.

A mixing-passage a, in the nature of a pipe or extension from thechamber R, connects with air-inlet pipe I), which extends at its openend within the-base A. A gas-inlet pipe 0, having a cut-oil or cock (I,and a gasvalve composed of a guide a and a valve properf, connects alsowith this mixing-passage a. Air and gas are both drawn into this passageby the ontstrokes of the engine-piston and on their way to thecheck-valve T become thoroughly mixed. This valve f we term thegas-admission valve; but if gasolene is used instead of gas then thisgasvalve will be substituted for a gasolenepump. The mechanism we arenow about to describe for operating this gas-valve will therefore beunderstood to be applicable to a gasolene-pump as well as to agas-valve, and so our description will treat the gas-valve andgasolene-pump as full equivalents in the combination embracing thedevices for operating the same.

The stem g (valve-stem) has a notched head h,adapted to be struck byahit-and-miss pin 2', provided with an adjustable contact collar orshoulder held by a thumb-screw 7a. This pin i is secured to a clip I,pivoted to an actuating-lever m, fulcrumed at 0 and having anantifriction-rollerp, operated by a cam q, so that the lever willvibrate up and down. This cam is secured to a rotatable shaft 2', havingsuitable bearings at the side of the engine, as will be more clearlyshown in Fi 1, and driven by a worm-gear s on the main shaft, meshingwith the worm-pinion t, mounted on the shaft '1', so that the shaftreceives constant rotary motion. A spring it, as seen in Fig. 2, holdsthe lever down on the cam at one end, and thereby tends to lift theother end. A bracket t, secured to the wall of the mixing-passage a,carries a fixed bar 10, havin g an incline ac, and carries a slidable orreciprocating plate 7 having a stud with an inclined face Now when thehit-and-miss pin 1' is moved up and down rapidly by the lever on itscontact-collarj will come in contact with the incline a; and willdeflect such pin enough to cause it to enter the notch in the head h ofthe stem g or will deflect it enough to cause it to miss the notch andpass over and strike upon the incline It will do the one or the other ofthese things, according to the speed with which the engine is running.It will be understood that the spring 2, connected with one end of thelever on and at the other to an arm 3, mounted on the pin 1' andadjusted by means of a thumbscrew 4, carried by a lug 5 on the clip I,will draw this pin 2' more or less inward and outward vertically. It isthis tension of the spring 2 that causes the contact-collar 7' to alwaysstrike the incline a3, and the degree that the incline will deflect thehit-and-miss pin is determined by the tension put upon the spring 2.This is determined by the speed at which you wish the engine to run. ifat high speed, the tension is made greater, so that the hit-and-1nisspin will strike the head 7L notwithstanding the greater tendency in highspeed of the incline or to deflect the pin to one side. If a lower speedis desired, then the spring 2 is put under a less tension, so that aless speed will deflect the pin away from the head h, and thus make theengine escape taking in gas one or more revolutions or until the speedlowers.

lVhen the hit-and-miss pin misses the head it and gas is accordingly notadmitted, the hitand-miss pin must actuate the platey, so as to hold theauxiliary exhaust-valve up to permit the escape of all of the productsof the previous explosion that may not have escaped through theexhaust-port proper and to permit any fresh air that may be drawn intothe cylinder to be exhausted during the strokes due to momentum. To dothis, the hitand-miss pin strikes the incline and shifts the plate y, sothat its projection 6 will pass under the projection 7 of the plate 8 onthe lover 9. The auxiliary exhaust-valve stem rests upon the plate 8 andis lifted by the lever f) at the proper time relatively to each instrokeof the piston, but is let down in time to hold in the charge undergoingcompression,unless, indeed, the plate 7 has been shifted so as to placethe projection (3 under the lug 7. In that case that end of the lever 9remains held up, and hence the auxiliary exhaust-valve is held up forthe purpose stated. Now, then, when the engine resumes the normal speedand the hit-and-miss pin 1' again strikes the head 7L the projection 1.0of the head strikes the incline 11 on the plate y and shifts the platein the other direction, so that its projection 6 will pass from underthe lug 7 and immediately let the auxiliary exhaust-valve down. Thus theplate 1 is shifted first in one direction and then in the other,according to whether thehit'and-miss pin misses the head 7t or resumesstriking it. The lever J is held down at one end by a spring 12 and upat the other, so as to bring its roller 13 in contact with the cam 14 onthe shaft r. A bolt 15 serves to connect the plate y with the bracket r,such bolt passing through a slot 16 in the plate.

A scale 17, with a pointer 18, serves to indicate the quantity of gasbeing admitted, so that the operator may know the proportion of gas toair.

We will now refer to a form of sparking device. A sparking-chamber 19 isbolted to the rear of the cylinder-head and provided with an openingclosed by a plug 20, so that gasolene can be poured into the chamber tobe used in making the initial start, as hereinafter described. In thecap 21 of the chamber is fitted a bushing 22, insulated by material 23,and having its lower end bifurcated to form jaws 23, in which ispivotally mounted a swinging contact-piece 24, adapted to come incontact with a spring-held stem 25 when it is swung to either side. Thisstem is provided so that the spring 26 can be housed in a sleeve 27,sufficiently remote from the heat not to be affected by it, and yetprovide a yielding means that will cause the swinging contact 24 toquickly return to normal position after being deflected to one side bythe wiping action of the contact-point of the other electrode. The foot28 of the stem 25 fits down on the contact-point 24. This constitutesone of the electrodes. The other electrode consists of a horizontalshaft 29, mounted in a bearing-sleeve 28, extending from the chamber 19,and at one end has a disk 30 secured to it and at the other a pin 31,forming a contact-point. This electrode is given a reciprocating rotarymotion or rocking motion,so that the point 31 sweeps against one side ofthe contact 24, and when the next cycle of operation is accomplished itsweeps against the other side, sparking each time.

We will now refer to the preferred means, though not the only means, forimparting the reciprocating rotary motion to the rocking electrode. Itconsists of pitmen 32 and 33, connected with the disk 30 and arranged toslide in a tubular guide 34, mounted on the side of the cylinder orotherwise supported. The pitmen rest one upon the other, as shown inFigs. 5 and 6, and a spring 35 acts to press the uppermost pitman as theundermost recedes down into line with the actuating-finger 36, which thespring also bears down on. This finger is mounted on the arm 37, pivotedto a bracket 38, secured to the bed. Aspring 39 draws the arm toward acam 40, mounted on a shaft r, so that an antit'riction-roller 41,mounted on .the arm, will constantly bear against this cam. \Vhen thethick side of the cam comes around against the roller 41, the arm isthrust rearward and the finger 36 engages with whichever of the pitmenhappens to project farthest forward. The cam is so timed that when oneexplosion is to be effected one of the pitmen is actuated and when thenext explosion is to be effected the other of the pitmen is actuated.Thus the contact-point 31 is moved against first one side and then theother of the contact-point 24. Between the strokes the point 31 remainsstill. Thus this mechanism sets up an intermittent rotary reciprocatingmotion.

Referring again to the main exhaust-port Z, it will be understood thatwhen the piston is given an outstroke by an explosion its heel passesand uncovers this port and the outer limit of the stroke is reached.When, however, the piston is making an outstroke due to momentum and isdrawing in a charge, the blocks G are in contact with the inturned endof the piston, and consequently the exhaust-port Z remains closed.

As the cam 40 is symmetrical, it will operate the arm 37 irrespective ofthe direction of rotation of the shaft 1". The result of this is that wecan start our engine by turning the main shaft backward or forward. Thusif the engine stops with the piston on the outstroke we can start up byturning it back,

because our sparking device will spark in either direction withoutbreaking. lVe do not, therefore, in such case have to turn the mainshaft forward when it makes an instroke and another outstroke to draw inthe charge and instroke to compress it. In this starting apparatus wepour a small quantity of gasolene into the chamber by removing the plug20.

Referring again to the springs I, which permit of a yielding connectionbetween the pis- These springs will therefore last much longer,

and at the same time produce the required work, than if they wereotherwise located.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is

1. In a gas-engine, the combination with a cylinder and a piston-rod,ofa piston connected therewith by a slidable joint having a fixed limit inone direction and a yielding or spring limit in the other direction, thecylinder having an exhaust-passage which is uncovered by the piston whenit shiftsin one direction relatively to the piston-rod.

2. In a gas-engine, the combination with a cylinder having an auxiliaryexhaust-port near one end, of a piston-rod, and piston, slidable blocksin the piston and connected with the piston-rod, shoulders back of theblocks, and springs acting between the blocks and the piston, saidexhaust-port being uncovered by the piston when it shifts in onedirection relatively to the piston-rod.

In a gas-engine, the combination with a charge-inlet device having astem or rod with a V-shaped notch in one of its ends, and a hit-and-misspin, and means to actuate the pin, of a tension device to draw the pinin one direction and a fixed device adapted to engage with the pin anddivert it against the action of the tension device, whereby when themomentum of the pin is such as to equalize the tension of the tensiondevice and the diversion of the diverting device the pin will strikewithin the V-shaped notch in said stem and actuate the inlet device, andwhereby when the momentum of the pin overcomes this harmony of tensionand diversion, the pin will miss the inlet device.

.L. In a gas-engine, the combination with a charge-inlet device and ahit-and-miss pin, means to actuate it, a tension device and a divertingdevice, of an auxiliary exhaustvalve, means to lift it and a shiftabledevice adapted to maintain and support it and to withdraw from it, saidshiftable device being actuated in one direction by the pin when itmisses the inlet device and in the other direction when it hits theinlet device.

5. In a gas-engine, the combination with a charge-inlet device, ahit-and-miss pin, means to actuate it, a tension device for the pin, aninclined surface to divert the pin against the tension device, ashiftable plate having two inclines, one to be actuated by the pin whenit raises the inlet device and the other to be actuated by the inletdevice when the pin hits it, an auxiliary exhaust-valve,

and means to liftit, said plate being adapted to be engaged with saidmeans to support the valve and to disengage from it to release thevalve.

6. In a gas-engine, the combination with a gas-inlet valve, a notchedhead on its stem, a lever, means to operate the lever, a hit-andmiss pinactuated by the lever, a collar or projection on the pin, an inclinedsurface adapted to be engaged by said collar or projection, a shiftableplate having two inclined surfaces, an auxiliary exhaust-valve, a leverto lift it, and means to operate the lever, said plate being adapted toengage said lever to hold the valve up and disengage therefrom to dropthe valve, said pin being adapted to operate the valve-stem and tooperate said plate in one direction and said head to operate the platein the other direction.

7. In a gas-engine, the combination with an auxiliary exhaust-valve andmeans to lift it, of a shiftable plate having two inclines, and ahitand-miss pin, and an intermediate device, and means to actuate thepin, whereby the pin will operate the plate in one direction and throughsaid intermediate device will operate the plate in the other directionfor the purpose described.

In testimony whereof we affix our signatures in presence of twowitnesses.

EMIL BAUROTII. \VILLIAM F. IBAUROTII. IVitn esses:

OLIVER II. MILLEP, W. M. McNAIR.

